feat(engine): declare per-harness content-block support and reject unsupported input - #515

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Zerlight wants to merge 10 commits into

ruocheng/code-636from

ruocheng/code-625

Commits on Sep 7, 2026

feat(schema): declare optional attachment capabilities and typed refusal
Zerlight
committed
d2e3b52
feat(agent-adapter): declare per-harness attachment support and refuse undeclared blocks
Zerlight
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ef05372
feat(engine): admit attachment refs against harness capability
Zerlight
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cf17d55
feat(engine): materialize prompt attachments for adapters
Zerlight
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207f3ca
feat(engine): persist admitted refs and project them without bytes
Zerlight
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52d0b48
fix(engine): refuse unsupported resource_link before persist
Zerlight
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5a1178f
fix(schema): keep the attachment representation list open on the wire
Zerlight
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d35e62b
fix(engine): charge every attachment ref occurrence against the prompt caps
Zerlight
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e7a3f05
fix(engine): materialize a repeated ref once and log cleanup failures
Zerlight
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602e66d
fix(engine): project the attachment kind off the resource_link title
Zerlight
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255e72d